T.Kumaravel, R.Arun , S.Dilipkumar, G.S.Bharathkumar. “Secure Attribute-Based Signature Scheme With Multiple Authorities for Blockchain in Electronic Health Record Systems”. International Journal of Advanced Science and Technology 29, no. 7 (June 1, 2020): 5183-5192. Accessed May 3, 2024. http://sersc.org/journals/index.php/IJAST/article/view/23619.